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Successful room temperature ambient-pressure magnetic levitation of LK-99

arxiv.org

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Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#131

Post by po »

jamesakirk wrote: post #31
taneq wrote: post #11

Earlier quoted context omitted.

I believe there’s no way to stably suspend an object on permanent magnetic fields, so if this is stable and doesn’t fall down then it’s hard to argue superconductivity isn’t involved.

You can stably suspend graphite pencil lead on permanent magnetic fields. E.G.: https://www.youtube.com/watch?v=yeIizmhzPQc

True, but only trapped within alternating N/S permanent magnetic poles... so it's possible to fool other people, but you won't be fooled yourself. Just don't use that magnetic setup. Superconducting materials will levitate in the field of a single magnetic pole.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#132

Post by jamesakirk »

montecarl wrote: post #127
jamesakirk wrote: post #31

Earlier quoted context omitted.

You can stably suspend graphite pencil lead on permanent magnetic fields. E.G.: https://www.youtube.com/watch?v=yeIizmhzPQc

On an array of magnets, but not on a single magnet.

Good point.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#133

Post by jxf »

tadfisher wrote: post #126
Terr_ wrote: post #77

Earlier quoted context omitted.

> in the US, you can't patent a material I'm no patent lawyer, but there is literally a US patent-office category covering "material" for exactly this kind of invention. Section 505 - "Superconductor Technology: Apparatus, Material, Process". > This is the generic class for subject matter involving (a) superconductor technology above 30 K and (b) Art collections involving superconductor technology. Apparatus, devices…

I'm assuming "Art collections" means something other than the common meaning, or else that's an oddly specific clause.

It means "art" in the broad sense of "prior art" (e.g. a creative endeavor), not art in the sense of MoMA or the Louvre. Though both kinds of art are beautiful in their way.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#134

Post by postalrat »

bagels wrote: post #119
postalrat wrote: post #94

Earlier quoted context omitted.

How would you prove there isn't any water in a cup?

I didn't see any references to cups or water in these papers.

If you can't answer the question then you won't ever understand how to measure zero resistance.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#136

Post by kadoban »

jamesakirk wrote: post #31
taneq wrote: post #11

Earlier quoted context omitted.

I believe there’s no way to stably suspend an object on permanent magnetic fields, so if this is stable and doesn’t fall down then it’s hard to argue superconductivity isn’t involved.

You can stably suspend graphite pencil lead on permanent magnetic fields. E.G.: https://www.youtube.com/watch?v=yeIizmhzPQc

Not on a single magnet though, it has to be a shaped array.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#137

Post by icapybara »

ChuckMcM wrote: post #129

For those experiencing this type of "black swan, but good" event for the first time, it is helpful to recognize that the human tendency to believe that all future "big events" will be dystopian downers, is statistically unsound. For a while I've kept a list of the things that could be "good" swan events, but to be fair I didn't have "room temperature superconductor on that list" :-) Other things that could happen: 1)…

1) doesn't make a whole lot of sense. A perfect understanding of something doesn't mean you can fix anything wrong with it.

3) has already happened. The AI chat bots aren't very smart, but they're clearly capable of some degree of basic reasoning.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#138

Post by Daneel_ »

jacquesm wrote: post #36
Daneel_ wrote: post #29

Earlier quoted context omitted.

It’s difficult to rule out external factors - a badly attached probe could also result in zero resistance for example. Showing diamagnetism is one of the least error-prone ways to demonstrate the superconductor effect. That’s my understanding anyway.

> a badly attached probe could also result in zero resistance for example No, a badly attached probe would usually show a larger resistance, not a smaller one. That's actually the easiest error to make, making improper contact with the sample. The resistance is measured indirectly using a reference current. So you'd measure a higher resistance or a break rather than zero if a probe were not attached correctly (unless…

Glad to be corrected, thank you.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#140

Post by JumpCrisscross »

0cf8612b2e1e wrote: post #53

On a completely different front, let's say the paper completely checks out and they have discovered this miracle. How strong are the patent protections on materials science? For example, if someone could replicate the effect with lead + gold, would that be considered a novel material which would not be subject to licensing? Is it the material itself or the method of production?

> let's say the paper completely checks out and they have discovered this miracle. How strong are the patent protections on materials science?

If it's literally a room-temperature superconductor, the present state of the law is irrelevant. China won't play by the rules. If Korea tries to corner it in the West, the rules will be replaced. (This would have been true had the inventor been French or American, too.)

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